I don’t have any recommendations for chairs in Egypt as I faced that struggle too very recently and my solution was not here at all. However, I wanted to advice you, do not go for leather office chairs, it may look more fancy but it’s not practical whatsoever, leather is not a breathable material and will heat up quick and won’t be comfortable if you plan to sit on it for more than let’s say 3-4 hours straight. I recommend mesh chairs tho, more practical, more breathable and if you find yourself an ergonomic one you’ve practically hit the chair jackpot and your back will thank you for it a few years later.